CN116330682A - Battery coating method, battery and battery coating production line - Google Patents

Battery coating method, battery and battery coating production line Download PDF

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Publication number
CN116330682A
CN116330682A CN202310580776.4A CN202310580776A CN116330682A CN 116330682 A CN116330682 A CN 116330682A CN 202310580776 A CN202310580776 A CN 202310580776A CN 116330682 A CN116330682 A CN 116330682A
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CN
China
Prior art keywords
battery
insulating film
coating
adhesive layer
shell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310580776.4A
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Chinese (zh)
Inventor
梁剑道
梁晓隆
杨贤明
冯宇炜
许俊海
袁昊博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yinpai Battery Technology Co ltd
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Yinpai Battery Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Yinpai Battery Technology Co ltd filed Critical Yinpai Battery Technology Co ltd
Priority to CN202310580776.4A priority Critical patent/CN116330682A/en
Publication of CN116330682A publication Critical patent/CN116330682A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
    • B29C65/526—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive by printing or by transfer from the surfaces of elements carrying the adhesive, e.g. using brushes, pads, rollers, stencils or silk screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/03—After-treatments in the joint area
    • B29C66/032—Mechanical after-treatments
    • B29C66/0322—Post-pressing without reshaping, i.e. keeping the joint under pressure after joining
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3468—Batteries, accumulators or fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

The application provides a battery coating method, a battery and a battery coating production line. The coating method is used for coating an insulating film on the outer side of the shell, and comprises the following steps: forming an adhesive layer with a thickness of 0.1-0.5 mm on the outer peripheral surface of the shell; the adhesive layer is covered with an insulating film, and the insulating film is connected with the adhesive layer by roll bonding. According to the battery coating method provided by the technical scheme, the adhesive layer with the thickness of 0.1-0.5 mm is formed on the outer peripheral surface of the shell, so that tiny burrs on the surface of the shell can be covered, the situation that the insulating film is scratched by the burrs on the surface of the shell in the process of coating the insulating film is reduced, and the yield is improved.

Description

Battery coating method, battery and battery coating production line
Technical Field
The application relates to the field of battery production, in particular to a battery coating method, a battery and a battery coating production line.
Background
The case of the lithium ion battery on the market needs to be insulated to prevent the battery from being shorted. Insulation between the cells is achieved by coating the blue film on the outside of the casing of the cell. The blue film is an insulating material and separates the shells of adjacent batteries, so that the influence on the adjacent batteries after the batteries fail is avoided.
In the existing coating process, after the blue film is coated on the shell, pressure is required to be applied to the blue film for shaping, and if burrs exist on the surface of the battery shell, the blue film is extremely easy to damage.
Disclosure of Invention
The application aims to provide a battery coating method, a battery and a battery coating production line, so as to reduce the damage of an insulating film of the battery in the coating process.
Embodiments of the present application are implemented as follows:
in a first aspect, embodiments of the present application provide a battery coating method, where a battery includes a housing and a cover, and an end of the housing is connected to the cover. The coating method is used for coating an insulating film on the outer side of the shell, and comprises the following steps:
forming an adhesive layer with a thickness of 0.1-0.5 mm on the outer peripheral surface of the shell;
the adhesive layer is covered with an insulating film, and the insulating film is connected with the adhesive layer by roll bonding.
According to the battery coating method provided by the technical scheme, the adhesive layer with the thickness of 0.1-0.5 mm is formed on the outer peripheral surface of the shell, so that tiny burrs on the surface of the shell can be covered, the situation that the insulating film is scratched by the burrs on the surface of the shell in the process of coating the insulating film is reduced, and the yield is improved. And in the process of setting the insulating film by adopting the method provided by the technical scheme, as the bonding layer is softer, the insulating film has certain deformability, and after the insulating film is contacted with the bonding layer, the insulating film can be flattened easily by rolling the insulating film, so that the situation that wrinkles appear after the insulating film is bonded is reduced.
With reference to the first aspect, in some embodiments, the adhesive layer is a pressure sensitive adhesive layer.
In the process of coating the insulating film, pressure is applied to the insulating film, and the pressure-sensitive adhesive can generate adhesive force in the process of applying the pressure, so that the insulating film is adhered to the shell of the battery.
In combination with the first aspect, in some embodiments, the battery is a square battery, the housing includes two large faces disposed opposite to each other and two small faces disposed opposite to each other, the large faces and the small faces are connected to form an outer peripheral surface of the housing, and the coating method includes:
the pressure-sensitive adhesive layer is formed on one large surface by means of screen printing, and then the battery is turned over to form the pressure-sensitive adhesive layer on the other large surface.
In the technical scheme, the pressure-sensitive adhesive layer is formed on the surface of the shell in a screen printing mode, so that automatic gluing is convenient to realize.
In combination with the first aspect, in some embodiments, when the roll bonding is performed, the two large faces and one small face are coated with continuous insulating films, and the insulating films are roll bonded to each other on the two large faces.
In combination with the first aspect, in some embodiments, a double roller is disposed on each large face for rolling fit, and the peripheral surfaces of the double rollers are connected by a belt transmission, and the belt is used for contacting with the insulating film.
Adopt the twin-roll and set up in the belt of twin-roll global at the in-process of roll-in laminating and extrude the insulating film, can make the insulating film atress more even, reduce the condition that appears fold, bubble after the insulating film bonds, improve the planarization after the insulating film bonds.
With reference to the first aspect, in some embodiments, in forming the adhesive layer on the outer peripheral surface of the case, the battery is clamped from both ends of the case by using a robot;
after the setting of the bonding layer is completed, the battery is transferred to a coating station by using a manipulator so as to coat the insulating film on the outer side of the shell.
According to the technical scheme, the battery is clamped from the two ends of the shell by the mechanical arm so as to form the adhesive layer on the outer peripheral surface of the shell, and then the battery is transferred to the coating station by the mechanical arm. The mode that adopts the manipulator to shift the battery to the diolame station can not cause the destruction to the adhesive linkage that forms at the casing periphery.
In a second aspect, an embodiment of the application provides a coated battery, including the battery, the battery includes casing and apron, and the end connection apron of casing, the outer peripheral face cladding of casing has the insulating film, is provided with the adhesive linkage between insulating film and the casing, and the thickness of adhesive linkage is in 0.1~0.5mm scope.
In the coated battery provided by the technical scheme, the adhesive layer with the thickness of 0.1-0.5 mm is arranged between the shell of the battery and the insulating film, and the adhesive layer can cover tiny burrs on the outer surface of the shell of the battery, so that the insulating film is prevented from being scratched by the burrs on the shell of the battery.
In a third aspect, embodiments of the present application provide a battery coating production line for coating a battery, where the battery includes a housing and a cover plate, and an end portion of the housing is connected to the cover plate. The battery coating production line comprises a control device, a mechanical arm, a sizing device and a coating device which are sequentially arranged; the control device is in control connection with the manipulator, the sizing device and the coating device;
the gluing device is used for forming an adhesive layer on the outer peripheral surface of the shell; the manipulator is used for transferring the battery with the formed adhesive layer to the coating device; the coating device is used for coating an insulating film on the surface of the bonding layer and enabling the insulating film to be arranged on the outer peripheral surface of the shell in a surrounding mode.
According to the technical scheme, the battery with the bonding layer is transferred to the coating device through the manipulator, so that the damage to the bonding layer arranged on the surface of the battery can be effectively reduced.
With reference to the third aspect, in some embodiments, the battery is a square battery, the sizing device is a screen printer, and the robot is configured to grasp the battery and position it in a printing area of the screen printer.
The screen printer is adopted as the sizing device and is in control connection with the control device, so that the formation of the adhesive layer on the outer surface of the shell of the battery can be realized in an automatic mode.
With reference to the third aspect, in some embodiments, the film coating device includes two sets of rubber roller assemblies oppositely disposed in a vertical direction, and a battery is disposed between the two sets of rubber roller assemblies;
the rubber roller assembly is a double roller, the peripheral surfaces of the double rollers are connected through belt transmission, and the belt is used for being in contact with the insulating film.
Through setting up two sets of rubber roll subassemblies of relative in vertical direction, can extrude the battery simultaneously from the upper surface and the lower surface of battery, make the insulating film be glued at the casing surface of battery through the adhesive linkage.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an encapsulated battery according to an embodiment of the present application;
fig. 2 is a schematic view of forming an adhesive layer on a side surface of a case by screen printing according to an embodiment of the present application;
fig. 3 is a schematic view of a dual roller assembly according to an embodiment of the present disclosure wrapping an insulating film on the outside of a battery.
Icon: 10-battery; 20-an adhesive layer; 30-an insulating film; 40-rubber roller assembly; 41-a first rubber roller; 42-a second rubber roller; 43-a belt; 51-mesh plate; 52-scraping plate.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the product of the application, are merely for convenience of description of the present application and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
The inventors of the present application found that, in the conventional production process of the battery 10, after the insulating film 30 is coated on the outside of the case of the battery 10, the insulating film 30 may be damaged. As a result of observation and analysis by the inventors, it was found that although the conventional battery 10 production line is provided with a step of detecting whether burrs exist on the outer surface of the case of the battery 10, the detection method is a manual detection method, and it is difficult to detect fine burrs on the outer surface of the case of the battery 10 by a manual detection method, and therefore, there is a problem that the insulating film 30 coated on the outer side of the case is broken due to the fine burrs existing on the surface of the case.
Based on the above, the inventor of the application provides a coated battery, and a corresponding battery coating method and battery coating production line.
In the coated battery provided in the present application, as shown in fig. 1, an adhesive layer 20 having a thickness in the range of 0.1 to 0.5mm is provided between the case of the battery 10 and the insulating film 30.
It should be understood by those skilled in the art that the case needs to be inspected before the case surface of the battery 10 is covered with the insulating film 30, and that burrs that are more apparent on the case surface can be removed during the inspection. For the fine burrs which are not removed, the mode that the fine burrs are covered by the adhesive layer 20 with the thickness ranging from 0.1 mm to 0.5mm is adopted on the outer surface of the shell, so that the problem that the insulating film 30 coated later is scratched by the burrs on the surface of the shell can be solved to a certain extent.
It should be noted that, the coated battery provided by the above technical scheme of the present application is not limited to square batteries, and for cylindrical batteries 10, blade batteries, and the like, the problem that the insulating film 30 is scratched by fine burrs on the surface of the housing of the battery 10 can be effectively improved by providing the adhesive layer 20 with a thickness ranging from 0.1 to 0.5mm between the insulating film 30 and the housing of the battery 10.
In some embodiments, the adhesive layer 20 is a pressure sensitive adhesive layer. The pressure sensitive adhesive has an adhesive capability under pressure. In the production process of the coated battery, in order to make the insulating film 30 closely adhere to the battery 10 and make the surface of the insulating film 30 after adhesion flat, therefore, pressure is applied to the insulating film 30 in the process of coating the insulating film 30, and the pressure-sensitive adhesive is adopted as the adhesive layer 20, so that the production process of the coated battery can be well matched. After the pressure is applied to the insulating film 30, the pressure sensitive adhesive is used for connecting the insulating film 30 with the battery 10 shell, so that the pressure sensitive adhesive is used as the adhesive layer 20, the insulating film 30 and the shell can be adhered by the adhesive force of the pressure sensitive adhesive after the surface of the insulating film 30 is leveled, and the situation that the insulating film 30 is wrapped on the battery 10 shell and then wrinkles are generated can be reduced to a certain extent.
In the coated battery provided in the present application, there is no limitation on the number of surfaces in which the adhesive layer 20 is provided in the outer peripheral surface of the case. Taking the battery 10 as a square battery as an example, the battery 10 includes a housing and cover plates disposed at two ends of the housing. The outer peripheral surface of the shell is formed by connecting two large surfaces which are oppositely arranged and two small surfaces which are oppositely arranged. In the process of assembling the battery 10 into a battery module, the two large surfaces of the battery 10 are in contact with each other, and the requirement for the insulating film 30 covering the large surfaces of the case is high.
Thus, in some embodiments of the present application, the adhesive layer 20 is provided only on two large faces of the housing.
Accordingly, the present application provides a battery 10 coating line for coating a battery 10. The battery 10 coating production line provided by the application comprises a sizing device and a coating device which are sequentially arranged. An adhesive layer 20 is formed on the outer peripheral surface of the case of the battery 10 by an adhesive applicator, and an insulating film 30 is coated on the outer peripheral surface of the case by a coating device.
Further, in some embodiments of the battery coating line, a manipulator is further provided, which is capable of clamping the battery 10 from both ends of the battery 10 and capable of reciprocating between the sizing device and the coating device.
Because the battery coating production line provided by the application needs to transport the battery 10 with the adhesive layer 20 arranged on the outer peripheral surface of the shell, the battery 10 is clamped by the mechanical arm from the two ends of the battery 10 by the mechanical arm, and the adhesive layer 20 arranged on the outer peripheral surface of the shell of the battery 10 is not damaged. In the present application, the specific implementation manner of clamping the battery 10 from both ends of the battery 10 by the manipulator is not limited, and for example, clamping may be performed by an air cylinder or clamping may be performed by a hydraulic cylinder.
The battery coating production line provided by the application is also applicable to the battery 10 without arranging the adhesive layer 20 on the outer peripheral surface of the shell in the production process by arranging the manipulator to transfer the battery 10. That is, the battery pack production line provided in the present application can also be used for the production of the battery 10 without the adhesive layer 20.
In one embodiment of the present application, the sizing device is a screen printer, and the battery 10 is grasped to a printing area of the screen printer by a robot, and as shown in fig. 2, the process of forming the adhesive layer 20 on the outer peripheral surface of the case of the battery 10 is performed by the screen 51 and the squeegee 52. In the embodiment employing a screen printer as the sizing device, the adhesive layer 20 may also be formed of a pressure-sensitive adhesive, and a pressure-sensitive adhesive composition useful for screen printing is disclosed in the prior art (publication No. CN 103525328A). However, the present application is not limited to the embodiment using a screen printer as the sizing device, and only the pressure-sensitive adhesive disclosed in the prior art can be used; also, not limited to the embodiment using a screen printer as the sizing device, the adhesive layer 20 may be formed using only a pressure-sensitive adhesive.
In this application, adopt screen printing machine as glue applying device, can be convenient for automatic realization form the process of bond line 20, the battery diolame production line that this application provided is including control system, all control connection through control system and glue applying device, manipulator, can realize that automatic control manipulator snatchs battery 10 to screen printing machine's printing region, later send the instruction to screen printing machine by control system again, make scraper blade 52 reciprocating motion in the screen printing machine, print the thick liquids on otter board 51 at the outer peripheral face of casing, in order to realize the process that forms bond line 20 automatically.
In one embodiment of the present application, in order to more efficiently realize the process of forming the adhesive layer 20 on the outer peripheral surface of the case of the battery 10, the number of screen printers is two. In the case of the battery 10 as a rectangular battery, the size of the large surface and the small surface of the case in the battery 10 are different, and therefore, the size of the region where the adhesive layer 20 needs to be provided is also different. For example, when a screen printer is used as the sizing device, the printing screen 51 having different print pattern sizes is required to print the small surface and the large surface of the case of the battery 10. If only one screen printer is used to form the adhesive layer 20 on the large surface of the case and to form the adhesive layer 20 on the small surface of the case, the printing screen 51 needs to be replaced halfway, and the adhesive layer 20 on the large surface and the small surface of the case is formed simultaneously in the same screen printer by replacing the screen 51 having different print pattern sizes.
Accordingly, in a preferred embodiment of the battery pack manufacturing line provided herein, a first screen printer and a second screen printer are included, the size of the pattern area of the screen 51 in the first screen printer being different from the size of the pattern area of the screen 51 in the second screen printer. The first screen printer is used to form the adhesive layer 20 on both large surfaces of the case of the battery 10, and the second screen printer is used to form the adhesive layer 20 on both small surfaces of the case. By adopting the mode that two screen printers are respectively formed by bonding the big surface and the small surface of the shell, the working efficiency is improved under the condition that the small surface and the big surface of the shell are provided with the bonding layer 20.
In other embodiments provided herein, the adhesive layer 20 may be formed on the outer peripheral surface of the housing of the battery 10 by other methods than screen printing, such as spraying, dipping, and 3D printing.
In some versions of the production line provided herein, the coating apparatus includes two sets of glue roller assemblies 40 disposed opposite one another in the vertical direction. As shown in fig. 3, the battery 10 provided with the adhesive layer 20 is transferred between two sets of glue roller assemblies 40 by a robot, and then an insulating film 30 is provided on the outside of the case of the battery 10, and the insulating film 30 is rolled by the glue roller assemblies 40, so that the insulating film 30 is flatly adhered to the surface of the case during the rolling process. In the embodiment in which the adhesive layer 20 is a pressure-sensitive adhesive, rolling the insulating film 30 also causes the pressure-sensitive adhesive to be forced to generate an adhesive force to adhere the flattened insulating film 30 to the outer peripheral surface of the case of the battery 10.
Preferably, the rubber roller assemblies 40 are double rollers, that is, each group of rubber roller assemblies 40 comprises a first rubber roller 41 and a second rubber roller 42, and the peripheral surfaces of the first rubber roller 41 and the second rubber roller 42 are in transmission connection through a belt 43. As shown in fig. 3, the insulating film 30 is rolled by the glue roller assembly 40, and after the glue roller assembly 40 presses the insulating film 30 on the right edges of the upper and lower surfaces of the housing, the glue roller assembly 40 moves leftwards, so that the upper and lower surfaces of the housing are adhered with the insulating film 30.
In the prior art, in the process of rolling the insulating film 30 by using a single roller, the rubber roller is in line contact with the insulating film 30, and in the process of moving the rubber roller, wrinkles may occur in the insulating film 30. In the embodiment of adopting the twin roll to roll-in to insulating film 30 that this application provided, contact by belt 43 in the rubber roll subassembly 40 and insulating film 30, for the face contact, rubber roll subassembly 40 is comparatively even to the effort that insulating film 30 applyed, can reduce the condition that insulating film 30 appears the fold after bonding, in addition, in the embodiment of adhesive linkage 20 adoption pressure sensitive adhesive, the pressure that receives of pressure sensitive adhesive is also comparatively even, also better to the bonding effect of insulating film 30.
Accordingly, the present application also provides a battery coating method for reducing the occurrence of scratch of the insulating film 30 during the coating of the battery 10.
The battery coating method provided by the application comprises the following steps: forming an adhesive layer 20 having a thickness of 0.1 to 0.5mm on the outer peripheral surface of the case of the battery 10; then, the adhesive layer 20 is covered with an insulating film 30. According to the method, the adhesive layer 20 with the thickness of 0.1-0.5 mm is formed on the outer peripheral surface of the shell before the insulating film 30 is coated, so that the effect of covering tiny burrs on the surface of the shell can be achieved, and after the insulating film 30 is adhered, the insulating film 30 is in direct contact with the adhesive layer 20 but not in contact with the burrs, and further the situation that the insulating film 30 is scratched is avoided.
Specifically, with the above-mentioned production line provided by the present application, the method for producing a square battery in which the adhesive layers 20 are provided on four sides of the outer peripheral surface of the case is as follows:
s1: the battery 10 is held from both ends of the battery 10 by a robot arm, the battery 10 is sent to a printing area of a first screen printer, and an adhesive layer 20 is formed on one side surface of the outer peripheral surface of the case.
S2: the battery 10 is turned over by 180 ° by rotation of the robot arm, and an operation of forming the adhesive layer 20 is performed on the other opposite side surface in the outer peripheral surface of the case in the printing area of the first screen printer.
S3: the battery 10 is transferred to the printing area of the second screen printer by the movement of the robot arm, and the adhesive layer 20 is formed on the remaining one of the sides of the outer peripheral surface of the case.
S4: the battery 10 is turned over by 180 ° by the rotation of the robot, and the operation of forming the adhesive layer 20 is performed on only the remaining one side surface of the outer peripheral surface of the case in the printing region of the second screen printer.
S5: the battery 10 is transferred between the two sets of rubber roller assemblies 40 disposed up and down by movement of the robot.
S6: an insulating film 30 is provided.
S7: the insulating film 30 is wrapped on the outside of the housing by two sets of glue roller assemblies 40.
In the above method, the operation process of coating the insulating film 30 on the outside of the case by using the rubber roll assembly 40 is identical to the operation process of coating the insulating film 30 on the outside of the case by a single rubber roll disposed opposite to each other in the prior art.
In the above-described coating method, the large surface and the small surface constituting the outer peripheral surface of the case are both side surfaces of the outer peripheral surface. In step S1, the adhesive layer 20 is formed on one side surface of the outer peripheral surface, and the side surface may be a large surface or a small surface.
The battery 10 may also be coated by other coating methods using the manufacturing line provided herein by those skilled in the art.
It should be noted that, the same as the prior art, the production line provided by the application is provided with the link that the manual work carries out the visual inspection to the burr on the casing to get rid of the great burr of casing outer peripheral face size, and then make the application provided set up 0.1~0.5mm thick adhesive linkage 20 at the outer peripheral face of casing and can cover remaining tiny burr completely, in order to avoid insulating film 30 by the tiny burr fish tail of casing outer peripheral face.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (10)

1. A battery encapsulation method, the battery comprising a housing and a cover plate, an end of the housing being connected to the cover plate, the method comprising:
forming an adhesive layer with the thickness of 0.1-0.5 mm on the outer peripheral surface of the shell;
and coating an insulating film outside the bonding layer, and connecting the insulating film with the bonding layer through roll lamination.
2. The battery coating method according to claim 1, wherein the adhesive layer is a pressure-sensitive adhesive layer.
3. The battery coating method according to claim 2, wherein the battery is a square battery, the case includes two large faces disposed opposite to each other and two small faces disposed opposite to each other, the large faces and the small faces are connected to form an outer peripheral surface of the case, the coating method comprising:
the pressure-sensitive adhesive layer is formed on one of the large faces by screen printing, and then the battery is turned over to form the pressure-sensitive adhesive layer on the other large face.
4. The battery coating method according to claim 3, wherein when the roll-bonding is performed, the continuous insulating film is coated on both the large faces and one of the small faces, and the insulating film is roll-bonded on both the large faces in opposition.
5. The battery coating method according to claim 4, wherein each of the large faces is provided with a double roller for roll bonding, the peripheral surfaces of the double rollers are connected by a belt transmission, and the belt is used for contacting the insulating film.
6. The battery coating method according to any one of claims 1 to 5, wherein the battery is clamped from both ends of the case by a robot during formation of the adhesive layer on the outer peripheral surface of the case;
after the setting of the bonding layer is completed, the battery is transferred to a coating station by using the manipulator so as to coat the insulating film on the outer side of the shell.
7. The coated battery is characterized by comprising a battery body and a cover plate, wherein the end part of the battery body is connected with the cover plate, the outer peripheral surface of the battery body is coated with an insulating film, an adhesive layer is arranged between the insulating film and the battery body, and the thickness of the adhesive layer is in the range of 0.1-0.5 mm.
8. The battery coating production line is used for coating a battery, and the battery comprises a shell and a cover plate, wherein the end part of the shell is connected with the cover plate; the battery coating production line is characterized by comprising a control device, a manipulator, a sizing device and a coating device which are sequentially arranged; the control device is in control connection with the manipulator, the sizing device and the coating device;
the sizing device is used for forming an adhesive layer on the outer peripheral surface of the shell; the manipulator is used for transferring the battery after the bonding layer is formed to the coating device; the coating device is used for coating an insulating film on the surface of the bonding layer and enabling the insulating film to be arranged on the outer peripheral surface of the shell in a surrounding mode.
9. The battery encapsulation line of claim 8, wherein the battery is a square battery and the sizing device is a screen printer, and the robot is configured to grasp the battery and position it in a print area of the screen printer.
10. The battery coating production line according to claim 8, wherein the coating device comprises two groups of rubber roller assemblies oppositely arranged in the vertical direction, and a battery is arranged between the two groups of rubber roller assemblies;
the rubber roller assembly is a double roller, the peripheral surfaces of the double rollers are connected through belt transmission, and the belt is used for being in contact with the insulating film.
CN202310580776.4A 2023-05-23 2023-05-23 Battery coating method, battery and battery coating production line Pending CN116330682A (en)

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